meperidine vs Demerol

meperidine and Demerol both are nouns.

Word	Noun	Adjective	Verb	Adverb
meperidine	Yes	No	No	No
Demerol	Yes	No	No	No

As nouns, meperidine and Demerol are synonyms defined as:

meperidine and Demerol: a synthetic narcotic drug (trade name Demerol) used to treat pain

Other synonyms of meperidine include meperidine hydrochloride.

meperidine (noun)	Demerol (noun)
a synthetic narcotic drug (trade name Demerol) used to treat pain	a synthetic narcotic drug (trade name Demerol) used to treat pain